Compression

so you don't loose low RPM torque.
But is that really the goal, obviously we want good low rpm torque, but is there an unacceptable and or a non functional amount of low torque ?

If there is wouldn't a stock 170 /6 be around there already and a 440+ not be able to get there at all?

I think we mistaken the low rpm range certain overlaps don't like to run at as a torque issue?